Learn Finnish: Jos sinulla on halu auttaa, sinun täytyy saada toimivalta toimia. - If you have a desire to help, you must get the authority to act.

They are infinitival complements to the abstract nouns halu (desire) and toimivalta (authority). In Finnish, abstract nouns expressing states of mind, abilities, rights, or permissions can often be followed directly by the first infinitive. This mirrors the English structure perfectly: a desire to help, authority to act.

Why is the object toimivalta in its basic nominative form after saada? Shouldn't a total object usually have an accusative -n ending?

This is a special rule for necessive structures. Because the action is driven by the necessity verb täytyy, the total object of the verb chain takes the nominative case (also known as the endingless accusative) rather than the regular -n ending. If the sentence were just Sinä saat toimivallan (You get the authority), you would use the standard -n ending.

Is there a connection between the noun toimivalta and the verb toimia?

Yes! Toimivalta is a compound of toimi (action, duty, or the stem of toimia) and valta (power, authority). It literally means power to act. Using toimivalta toimia right next to each other sounds slightly repetitive but is the standard administrative or legal phrasing for authority to act.

Why does the sentence use sinulla on for the first half, but for the second? Both just translate as 'you' in English.